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OKI ES8451

The A4/A3 colour MFP that adds value and versatility to small workgroups

  • A3 colour workgroup MFP - Print, Copy, Scan and Fax
  • A4 34ppm mono/22ppm colour A3 17ppm/12ppm print speeds
  • 400 sheet standard paper capacity (up to 1,460 sheets)
  • PCL, PostScript, IBM and Epson printer language emulation
  • Auto duplex as standard

Affordable A4/A3 versatility
Based on award winning technology, the ES8451 MFP makes versatile A4/A3 printing, scanning, photocopying and faxing accessible to every business.

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Key specifications

  • Print speedA4: 22ppm colour, 34ppm mono; A3: 12ppm colour, 17ppm mono

Full specifications

Configurations Available

  • MultifunctionPrint, Scan, Copy and Fax


  • Print speedA4: 22ppm colour, 34ppm mono; A3: 12ppm colour, 17ppm mono
  • Time to first print (TTFP)11.5 seconds colour, 9.5 seconds mono
  • Warm up time90 seconds or less from power on
  • Processor speedPowerPC750 500MHz


  • Scan Resolution600 x 600dpi
  • Scan SpeedUp to 34spm
  • Colour depthOutput 24-bit (8-bit x 3 RGB)
  • Document input50-sheet Reverse Automatic Document Feeder (RADF)
  • Contrast7 Levels
  • FormatPDF, TIFF, JPEG, XPS
  • AddressbookLDAP & internal address book
  • Scan toFolder (CIFS), E-Mail, FTP, HTTP, USB Memory


  • First copy out16 seconds colour, 13 seconds mono
  • Copy speed22cpm colour, 34cpm mono
  • Copy resolution600dpi
  • Reduction/EnlargementZoom 25-400%
  • Maximum copies999


  • Fax connectivityRJ11 x 2 (Line/Tel), PSTN, PBX
  • Fax speedITU-T G3 (Super G3) 33.6kbps
  • Speed dials500
  • Groups32
  • BroadcastUp to 530
  • Fax memory16MB (approx 1,000 pages)

Operator panel

  • LCD panel14.5cm back-lit touch-screen
  • Key pad12 numeric, 4 main function buttons, Color & Mono Start, Setup, Job Programs, Reports, Reset, Help, Power Save, Interrupt Key, Fax Job View/Cancel & Stop Key

Interface and Software (MFP)

  • ConnectivityHi-Speed USB, 10/100-TX Ethernet, Parallel Port
  • Printer languagePCL 5c, PCL 6 (Windows), PostScript (Windows/Mac)
  • Network & protocols10Base-T/100Base-TX Ethernet Card with internal Web Server for printer and network card set-up and management. Includes POP3/APOP and SMTP Mail client for submission of print jobs and for alerts. All major network protocols supported - TCP/IP:- ARP, RARP, IPv4/v6, ICMPv4/v6, TCP, UDP, LPR, FTP, TELNET, HTTP(IPP), BOOTP, DHCP, SNMPv1/v3, DNS, DDNS, UPnP, Bonjour, WINS, SSL/TLS, SMTP, POP3, SNTP, WSDPrint, JetDirect protocols, NetBIOSoverTCP, Kerberos. NetWare 3.x, 4.x, 5.x & 6 with full NDS and NDPS support:- PServer, RPrinter, NDPS supported via dedicated OKI NDPS Gateway. Ethertalk:- ELAP, AARP, DDP, AEP, NBP, ZIP, RTMP, ATP, PAP. NetBEUI:- SMB, NetBIOS. Other:- EAP.
  • Advanced networking and securityIPv6, 802.1x authentication, IPSec, SNMPv3, SSL3/TLS HTTPS encryption, Secure Erase, Data Encryption, MAC filtering, IP filtering, Secure Print
  • OS CompatibilityWindows 2000 / XP (32-bit & 64-bit) / Server 2003 (32-bit & 64-bit) / Server 2008 (32-bit & 64-bit) / Server 2008 R2 / Vista (32-bit & 64-bit) / 7 (32-bit & 64-bit); Mac OS X 10.3.9 or greater
  • Utility suiteColor Correct, OKI LPR,, Swatch Utility, Template Manager, Web Driver Installer, WebPrint, Print, Control Server, Print Control Client, Print Control Report Tool, Storage Device Manager, Gamma Utility, Profile Assistant, PDF Direct Utility, Configuration Tool, Actkey
  • Document managementNuance PaperPort SEv11, Nuance OmniPage SEv16

Print quality

  • ResolutionProQ2400 Multi-level technology, 1200 x 600dpi
  • EnhancementsAuto Colour Balance, Photo Enhance via Driver (Windows only)


  • Printer fontsScalable: 86 PCL fonts & 136 PostScript fonts, PCL Bitmap fonts, OCR-A/B, USPS ZIP Barcode

Paper Handling (MFP)

  • Paper capacityTray 1: 300 sheets of 80gsm; Multi-purpose tray: 100 sheets of 80gsm; RADF: 50 sheets of 80gsm
  • Paper capacity optional tray2nd tray + tall cabinet: 530 sheets of 80gsm (Standard on ES8451cdtn); 2nd/3rd tray + short cabinet: 1,060 sheets of 80gsm (Standard on ES8451cdxn)
  • Maximum paper capacityES8451dn: 400 sheets of 80gsm; ES8451cdtn: 930 sheets of 80gsm; ES8451cdxn: 1,460 sheets of 80gsm
  • Paper sizesTray 1: A3, B4, A4, A5, B5, A6; Tray 2/3: A3, B4, A4, A5, B5; Multi-purpose tray: A3, B4, A4, B5, A5, A6, Envelopes (Com10, DL, C4, C5), Labels (Avery 7162, 7664, 7666), Transparencies, Custom size: Width 64-297mm Length 105-1200mm; RADF: A3, A4, A5, B4, B5; Duplex: A3, A4, A5, B4, B5, Custom size: Width 148.5-297mm Length: 182-431.8mm
  • Paper weightTray 1: 64 to 120gsm; Tray 2/3: 64 to 176gsm; Multi-purpose tray: 64 to 200gsm; RADF: 42 to 128gsm; Duplex: 64 to 105gsm
  • DuplexStandard
  • Paper output250 sheets face down, 100 sheets face up

General Features

  • Memory (RAM)Standard: 512MB (2 x 256MB); Maximum: 768MB (1 x 256MB, 1 x 512MB)
  • Memory (Hard Disk Drive)40GB
  • Operating temperature/ humidty10°C to 32°C (17°C to 27°C recommended) / 20% to 80% RH (50% to 70% RH recommended)
  • Storage temperature/ humidty-10°C to 43°C / 10% to 90% RH
  • Power supplySingle phase 220–240VAC, frequency 50/60Hz +/- 2%
  • Power consumptionTypical: 700W; Peak: 1300W; Idle: 160W; Power Save: <25W
  • Noise levelOperating: 54dB(A) or less, Standby: 37dB(A) or less, Power save: Background
  • Dimensions (HxWxD)ES8451dn: 669 x 565 x 658mm; ES8451cdtn: 1130 x 845 x 766mm; ES8451cdxn: 1130 x 845 x 766mm
  • WeightES8451dn: 68kg; ES8451cdtn: 95kg; ES8451cdxn: 100kg (includes all consumables)